Income Taxes - Rollforward of Deferred Tax Assets Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	$ 108.8	$ 123.0	$ 129.8
Change in assessment	(1.1)	(1.9)	(6.2)
Current year operations	(5.3)	(12.3)	(0.6)
Deferred Tax Assets, Valuation Allowance, Ending Balance	102.4	108.8	123.0
State and Local Jurisdiction [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	35.7	40.4	48.5
Change in assessment	0.0	0.0	0.0
Current year operations	3.8	(4.7)	(8.1)
Deferred Tax Assets, Valuation Allowance, Ending Balance	39.5	35.7	40.4
Foreign Tax Authority [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	73.1	82.6	81.3
Change in assessment	(1.1)	(1.9)	(6.2)
Current year operations	(9.1)	(7.6)	7.5
Deferred Tax Assets, Valuation Allowance, Ending Balance	$ 62.9	$ 73.1	$ 82.6